Supercells can occur anywhere in the world under the right weather conditions.
A supercell is a thunderstorm that is characterized by the presence of a mesocyclone (a deep, persistently rotating updraft.)
For this reason, these storms are sometimes referred to as rotating thunderstorms.

Many may ask how often does supercell storms occur in Finland.
FMI (finnish metrology institute) made a research about severe hail events between 1999 and 2011

During 1999−2011 FMI received 26 significant hail reports.
These where also verified on radar.

The results show that (78%) of the
significant hail causing storms in Finland where supercell
storms.